The cooling process noted in the Old World has also occurred in the New, and America of the twentieth century smiles at Bancroft's complacent idealization of the Puritan colonies. Even the slavery struggle, the ashes of which are scarcely yet cold, has found in James Ford Rhodes a historian who can do justice to Jefferson Davis and Lee no less than to Lincoln and Grant. But no American scholar compares in world-wide influence with Mahan, whose study of Sea-Power in the seventeenth and eighteenth centuries, published in 1889, not only founded a school of naval history but was inwardly digested by distinguished pupils in both hemispheres, among them the Emperor William II and Theodore Roosevelt. The Admiral's writings owe their importance not to research, for few new facts are brought to light, but to the new angle from which familiar events are envisaged. Occasionally, perhaps, the element of sea-power in the determination of a particular result is over-emphasized at the expense of other factors; but he was the first to seize the wider bearings of naval history and to make the general reader aware of its momentous significance. The scope of history has gradually widened till it has come to include every aspect of the life of humanity. No one would now dare to maintain with my old master Seeley that history was the biography of States or with Freeman that it was merely past politics. The growth of nations, the achievements of men of action, the rise and fall of parties remain among the most engrossing themes of the historian; but he now casts his net wider and embraces the whole opulent record of civilization. The influence of nature, the pressure of economic factors, the origin and transformation of ideas, the contribution of science and art, religion and philosophy, literature and law, the material conditions of life, the fortunes of the masses--such problems now claim his attention in no less degree. He must see life steadily and see it whole. We must master such revealing works as Lecky's histories of Rationalism and Morals, Burckhardt's and Symonds' interpretations of the Italian Renaissance, Sainte-Beuve's full-length portrait of the Jansenists, Morley's studies of Voltaire, Rousseau and the Encyclopaedists, Dean Church's sketch of the Oxford Movement, and Merz's survey of European Thought in the nineteenth century, if we are to understand the throbbing life of the human spirit. We must measure the operation of economic factors and forces and profit by the faithful labours of Schmoller and Thorold Rogers, Cunningham and Kovalevsky, the Webbs and the Hammonds, if we are to visualize the life of the unnumbered and the unknown who have done the routine work of the world.